CRL 6″ x 10″ Center Push Button Locks require no electrical connections so the mounting is exactly the same as our other 6″ x 10″ Center Locks. On the exterior side of the door is a Keypad with five vertical push buttons, numbered in sequential order from top to bottom. On the interior side there is a lever, which operates the latch bolt at all times. The lock complies with A.D.A. standards and is ideal for high frequency use in hospitals, entrances to commercial and industrial buildings, apartments, condominiums, schools, etc. The Center Lock Glass Keepers series DLK610 are sold separately. They are specially machined to accept the strike from the Push Button Lock. If a Center Lock Glass Keeper is not required, a Strike Plate for the jamb is supplied with the Push Button Lock Assembly. Gaskets are available on special order for doors using 3/8 inch (10 millimeter) glass doors.